/*
  ModuKraft Shared Styles
  Folder: assets/css/styles.css
  Tailwind handles layout and utilities; this file contains reusable effects,
  animation states, lightbox styling, sliders, and accessible refinements.
*/

:root {
  --mk-charcoal: #111827;
  --mk-warm-white: #f8fafc;
  --mk-teal: #14b8a6;
  --mk-wood: #b8875b;
  --mk-muted: #6b7280;
}

html {
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(20, 184, 166, 0.22);
  color: var(--mk-charcoal);
}

/* Navigation */
.site-nav {
  transition: background-color .35s ease, box-shadow .35s ease, backdrop-filter .35s ease;
}

.site-nav.is-scrolled {
  background: rgba(248, 250, 252, .94);
  box-shadow: 0 12px 40px rgba(17, 24, 39, .08);
  backdrop-filter: blur(18px);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 1.5px;
  background: var(--mk-teal);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .3s ease;
}

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Scroll-reveal states — visible by default; hidden only once JS is active */
.reveal {
  transition: opacity .85s cubic-bezier(.2,.8,.2,1), transform .85s cubic-bezier(.2,.8,.2,1);
  will-change: opacity, transform;
}

html.js .reveal:not(.is-visible) {
  opacity: 0;
}

html.js .reveal:not(.is-visible).fade-up { transform: translateY(34px); }
html.js .reveal:not(.is-visible).fade-in { transform: scale(.985); }
html.js .reveal:not(.is-visible).slide-left { transform: translateX(-46px); }
html.js .reveal:not(.is-visible).slide-right { transform: translateX(46px); }
.reveal.is-visible { opacity: 1; transform: none; }

.stagger > * {
  transition: opacity .7s ease, transform .7s ease;
}

html.js .stagger:not(.is-visible) > * {
  opacity: 0;
  transform: translateY(24px);
}

.stagger.is-visible > * {
  opacity: 1;
  transform: none;
}

.stagger.is-visible > *:nth-child(2) { transition-delay: .08s; }
.stagger.is-visible > *:nth-child(3) { transition-delay: .16s; }
.stagger.is-visible > *:nth-child(4) { transition-delay: .24s; }
.stagger.is-visible > *:nth-child(5) { transition-delay: .32s; }
.stagger.is-visible > *:nth-child(6) { transition-delay: .4s; }

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  font-size: .72rem;
  font-weight: 700;
  color: var(--mk-teal);
}

.section-kicker::before {
  content: "";
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width .8s cubic-bezier(.2,.8,.2,1);
}

.reveal.is-visible .section-kicker::before,
.is-visible.section-kicker::before {
  width: 2.6rem;
}

/* Image interactions */
.media-zoom {
  overflow: hidden;
}

.media-zoom img {
  transition: transform .9s cubic-bezier(.2,.8,.2,1), filter .6s ease;
}

.media-zoom:hover img {
  transform: scale(1.06);
}

.image-overlay {
  background: linear-gradient(180deg, transparent 35%, rgba(17,24,39,.82));
}

.noise-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .07;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.6'/%3E%3C/svg%3E");
}

/* Decorative grid */
.grid-surface {
  background-image:
    linear-gradient(rgba(17,24,39,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17,24,39,.055) 1px, transparent 1px);
  background-size: 52px 52px;
}

/* Buttons */
.mk-btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.mk-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(255,255,255,.16);
  transform: translateX(-110%) skewX(-18deg);
  transition: transform .55s ease;
}

.mk-btn:hover::before {
  transform: translateX(110%) skewX(-18deg);
}

/* Gallery masonry */
.masonry {
  column-count: 1;
  column-gap: 1rem;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 1rem;
}

@media (min-width: 640px) {
  .masonry { column-count: 2; }
}

@media (min-width: 1024px) {
  .masonry { column-count: 3; column-gap: 1.25rem; }
  .masonry-item { margin-bottom: 1.25rem; }
}

/* Lightbox */
.mk-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(6, 11, 20, .94);
  backdrop-filter: blur(16px);
}

.mk-lightbox.is-open {
  display: grid;
  place-items: center;
  animation: lightboxIn .25s ease both;
}

.mk-lightbox img {
  max-width: min(92vw, 1200px);
  max-height: 82vh;
  object-fit: contain;
  border-radius: 1.25rem;
  box-shadow: 0 28px 80px rgba(0,0,0,.4);
}

@keyframes lightboxIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Before / after */
.before-after {
  position: relative;
  overflow: hidden;
  user-select: none;
  touch-action: none;
}

.before-after .after-layer,
.before-after .before-layer {
  position: absolute;
  inset: 0;
}

.before-after .before-layer {
  width: 50%;
  overflow: hidden;
  z-index: 2;
}

.before-after .before-layer img {
  width: var(--ba-width, 100%);
  max-width: none;
}

.before-after .ba-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  z-index: 4;
  width: 2px;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(17,24,39,.18);
}

.before-after .ba-handle::after {
  content: "↔";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  color: var(--mk-charcoal);
  background: #fff;
  box-shadow: 0 10px 30px rgba(17,24,39,.18);
  font-size: 1rem;
}

/* Carousel */
.testimonial-track {
  display: flex;
  transition: transform .65s cubic-bezier(.2,.8,.2,1);
}

.testimonial-slide {
  min-width: 100%;
}

/* Configurator */
.config-card.is-selected {
  border-color: var(--mk-teal);
  box-shadow: 0 0 0 3px rgba(20,184,166,.13), 0 18px 45px rgba(17,24,39,.08);
  transform: translateY(-4px);
}

/* Form controls */
.mk-field {
  transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
}

.mk-field:focus {
  outline: none;
  border-color: var(--mk-teal);
  box-shadow: 0 0 0 4px rgba(20,184,166,.12);
  background: #fff;
}

/* Scroll indicator */
.scroll-dot {
  animation: scrollDot 1.8s ease-in-out infinite;
}

@keyframes scrollDot {
  0% { transform: translateY(0); opacity: 0; }
  20% { opacity: 1; }
  75% { opacity: 1; }
  100% { transform: translateY(18px); opacity: 0; }
}

/* Accessible reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html.js .reveal:not(.is-visible),
  html.js .stagger:not(.is-visible) > *,
  .reveal, .stagger > * { opacity: 1 !important; transform: none !important; }
}